|Japanese name:||辰巳 春菜|
|School:||Yoshinoyama Elementary School|
|Grade:||Sixth-year elementary school|
|Debut:||Saki Achiga-hen, Chapter 1|
Haruna Tatsumi is a supporting character of the Saki Achiga-hen episode of side-A anime and manga.
Haruna has medium length light-brown hair and brown eyes. She always wears a hat on her head.
Haruna is a student at Yoshinoyama Elementary School. She was a member of the Achiga childrens mahjong club before it was disband. She is shown throughout the manga and anime cheering on the Achiga mahjong team with everyone from the old childrens mahjong club.